JP6560212B2 - 肺に対する特異性を有する新たなペプチド - Google Patents
肺に対する特異性を有する新たなペプチド Download PDFInfo
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- JP6560212B2 JP6560212B2 JP2016532677A JP2016532677A JP6560212B2 JP 6560212 B2 JP6560212 B2 JP 6560212B2 JP 2016532677 A JP2016532677 A JP 2016532677A JP 2016532677 A JP2016532677 A JP 2016532677A JP 6560212 B2 JP6560212 B2 JP 6560212B2
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Description
(a)配列番号9のアミノ酸配列、
(b)配列番号9のアミノ酸配列と少なくとも80%同一であるアミノ酸配列、または
(c)(a)もしくは(b)に定義されるアミノ酸配列のうちの1つの断片、を含むか、これらからなるカプシドタンパク質に関する。
更なる一態様において、本発明は、本発明のウイルスベクター、特にAAVベクターを含む薬学的組成物を提供する。この場合のウイルスベクターは、治療的に有効な量で、すなわち、治療される肺機能障害または肺疾患の少なくとも1つの症状を相当に改善するか、疾患の悪化を防ぐために十分な量で、患者に投与される。肺疾患に通常関連付けられる症状は、咳、発熱、胸痛、嗄声、及び呼吸困難を含む。治療的に有効な量の本発明に従うベクターは、言及した症状のうちの1つにおける正の変化、すなわち、罹患した対象の表現型が、肺疾患を患わない健康な対象の表現型に近づくことをもたらす変化を引き起こす。
組織特異的AAV2カプシドの選択のために、無作為表示ペプチドライブラリを調製し、4回選択した。以前に説明された2段階プロトコル[26〜27]を使用して、個々にクローンを発生する、1×108個の理論上の多様性を有する無作為X7−AAVペプチドライブラリを調製した。VP1におけるアミノ酸位置R588に対応する、AAVゲノムにおけるヌクレオチド位置3967で7つの無作為化アミノ酸をコードする縮重オリゴヌクレオチドを、最初に産生した。オリゴヌクレオチドは、配列5′−CAGTCGGCCAGAGAGGC(NNK)7GCCCAGGCGGCTGACGAG−3′(配列番号11)を有した。Sequenase(Amersham,Freiburg,Germany)及び配列5′−CTCGTCAGCCGCCTGG−3′(配列番号12)を有するプライマーを使用して、第2の鎖を産生した。二本鎖挿入断片をBglIで切断し、QIAquick Nucleotide Removal Kit(Qiagen,Hilden,Germany)で精製し、SfiI消化ライブラリプラスミドpMT187−0−3でライブラリに結紮した[26]。寒天を含有する150mg/mlのアンピシリン上、代表的な一定分量の、形質転換した電気適格性DH5αバクテリアから増殖したクローンの数によって、プラスミドライブラリの多様性を決定した。ライブラリプラスミドを収集し、QiagenからのPlasmid Preparation Kitを使用して精製した。10枚の細胞培養皿(15cm)中の2×108個の293T細胞に、プラスミドpVP3cm(末端逆位配列を有さない修飾コドンの使用を有する野生型cap遺伝子を含有)[27]、ライブラリプラスミド、及びpXX6ヘルパープラスミド[28]を形質移入することによって、AAVライブラリゲノムをキメラ野生型及びライブラリAAVカプシド(AAV導入シャトル)内にパッケージングし、プラスミド間の比率は1:1:2であった。結果として生じるAAVライブラリ導入シャトルを使用して、細胞培養皿(15cm)中の2×108個の293T細胞を、1つの細胞当たり0.5複製単位の感染効率で感染させた。細胞を、5プラーク形成単位(pfu/細胞)の感染効率で、Ad5(Laboratoire de Therapie Genique,Franceによる提供)で重感染させた。48時間後に、上清から最終AAV表示ライブラリを収集した。VivaSpin Column(Viva Science,Hannover,Germany)を使用して上清を濃縮し、以前に説明されたイオジキサノール密度勾配超遠心分離[29]によって精製し、LightCyclerシステム(Roche Diagnostics,Mannheim,Germany)で、cap特異的プライマー5′− GCAGTATGGTTCTGTATCTACCAACC−3′(配列番号13)及び5′−GCCTGGAAGAACGCCTTGTGTG−3′(配列番号14)を使用するリアルタイムPCRによって滴定した。
実施例1で濃縮されたクローンを組み換えAAVベクターとして産生し、それらの形質導入プロファイルについて試験した。組み換えAAVベクターを、HEK293T細胞の三重形質移入によって産生した。1%のペニシリン/ストレプトマイシン及び10%のウシ胎仔血清を補った、Dulbecco’s modified Eagle Medium(Invitrogen,Carlsbad,USA)中、37℃、5%のCO2で細胞をインキュベートした。形質移入薬剤Polyfect(Qiagen,Hilden,Germany)によって、プラスミドDNAを293T細胞内に形質移入した。形質移入の4日後、細胞を収集し、溶解させ、以前に説明されたイオジキサノール密度勾配超遠心分離の手段[29]によってベクターを精製した。形質移入のために、ルシフェラーゼ遺伝子pUF2−CMV−luc[27]またはGFP遺伝子pTR−CMV−GFP[30]をコードするアデノウイルスヘルパープラスミドとしてpXX6を使用し、対象のAAVカプシドをコードするプラスミドもまた使用した[28]。AAVライブラリから既に選択されているAAVカプシド変異体をコードするプラスミド、及び野生型対照は、修飾pXX2−187[31]またはpXX2[28]であった。更に、アラニンスキャニングのために、ペプチドESGHGYFの修飾変異形をコードする、更なるオリゴヌクレオチド挿入断片を作製した。記載するように、挿入断片をライブラリ挿入断片に処理した(上記を参照されたい)。組み換えベクターを定量化するために、以前に説明されたLightCyclerシステム[32]によって、CMV特異的プライマー5′−GGCGGAGTTGTTACGACAT−3′(配列番号19)及び5′−GGGACTTTCCCTACTTGGCA−3′(配列番号20)を使用するリアルタイムPCRによって、ゲノム力価を決定した。
インビボでの濃縮ペプチドの向性の検査を可能にするために、ルシフェラーゼレポーター遺伝子を含む組み換えベクターのカプシド中にペプチドを導入した。変異カプシドを有するベクターを、対照ベクターとともにマウスに注入した。5×1010個のベクターゲノム(vg)/マウス(1つの注入されたAAVクローン当たり、n=3匹の動物)の用量で、AAVベクターを静脈内投与した。14日目に、イソフルランで動物を麻酔した。1匹のマウス当たり200μlのルシフェリン基質(150mg/kg、Xenogen)の腹腔内注入に続いて、Living Image4.0(Caliper)ソフトウェアを備えるXenogen IVIS200撮像システム(Caliper Lifescience,Hopkinton,USA)を使用して、ルシフェラーゼ発現を分析した。相対光単位(光子/秒/cm2)における発光が最高の強度に達するとき、異なる位置(腹側、背側、外側)での導入遺伝子の発現の、代表的なインビボ生物発光画像を撮影した。その後、動物を屠殺し、対象の器官を素早く取り除き、各器官内の導入遺伝子の発現の画像を直ちに撮影した。その後、器官を液体窒素中で凍結させ、−80℃で保管した。Living Image4ソフトウェアのDLIT選択肢を使用することによって、インビボ発光画像の3次元再構築を得、発光された光を、560〜640nmの5つの異なる波長においてそれぞれ3分間ずつ測定した。ルシフェラーゼ発現を定量化するために、器官をレポーター溶解緩衝液(RLB,Promega,Madison,USA)中でホモジナイズした。100μLのルシフェラーゼアッセイ試薬(LAR,Promega)の添加後、ルシフェラーゼレポーター遺伝子活性の決定を、ルミノメーター(Mithras LB9 40,Berthold Technologies,Bad Wildbad,Germany)において、10秒間隔、各測定間に2秒間の遅延で実行した。Roti NanoQuant protein assay(Roth,Karlsruhe,Germany)を使用して、タンパク質の全量に関して各試料において値を正規化した。
肺特異性に関する、ペプチドESGHGYFにおける個々のアミノ酸の重要性を調査するために、アラニンスキャニングを実行した。
静脈内注入されたESGHGYFベクターの導入遺伝子の肺特異的発現が、肺特異的ホーミングに基づくかどうかを確認するために、まず、5×1010gp/マウスの静脈内投与の4時間後にベクターの分布を調査した。ベクターゲノムの定量化を、リアルタイムPCRによって実行した。まず、組織ホモジナイザー(Precellys24,Peqlab,Erlangen,Germany)及びDNeasy Tissue Kit(Qiagen,Hilden,Germany)を製造業者の説明書に従って使用して、5×1010vg/マウスの静脈内投与後の様々な時点で、関係する器官から全DNAを抽出した。分光光度計(NanoDrop ND−2000C,Peqlab)を使用して、DNAを定量化した。前述のCMV特異的プライマーを使用する定量的リアルタイムPCRによって、組織内のAAVベクターDNAの分析を実行し、40ngのテンプレートを使用し、全DNAに関して正規化した。
免疫組織化学的検査を使用して、ペプチドESGHGYF及び/または対照として野生型AAVカプシドを有するrAAV−GFPベクターの静脈内投与の14日後の、肺及び対照器官における細胞レベルでの導入遺伝子の発現を可視化した。動物の肺を、20分間、20cmの水の静水圧下、気管を通して、4%(w/v)のパラホルムアルデヒドによってエキソサイチュで固定し、同一の固定液中、24時間の浸漬を続けた。肺組織をパラフィン内に包埋した。2μmの厚さを有する切片をワックスから取り除き、再水和し、免疫組織化学的検査のために使用した。GFP(A−11122、Invitrogen)またはCD31(AB28364、Abcam,Cambridge,USA)のポリクローナル抗体を使用して、免疫組織化学的手順を実行した。内因性ペルオキシダーゼを、メタノール中、1%のH2O2で30分間不活性化した。CD31での染色前に、切片をクエン酸緩衝液(pH6.0)中、100℃で20分間加熱した。PBS中で洗浄した後、PBS、10%のヤギ血清(Vector Lab,Burlingame,USA)及び2%の粉乳(Roth)とともに切片を30分間インキュベートした。原発抗体を37℃で1時間結合させた。PBS中で洗浄した後、二次ビオチン化ヤギ抗ウサギ抗体(Vector Lab)とともに切片を30分間インキュベートした。VECTASTAIN−Elite ABC Kit(Vector Lab)及び3,3′−ジアミノベンジデン(DAB,Sigma−Aldrich,St.Louis,USA)を使用することによって、結合した抗体を可視化した。選択された切片をヘマラムで対比染色した。
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Claims (26)
- 配列番号1のアミノ酸配列を含むことを特徴とする、肺の細胞に特異的に結合するウイルスベクターのカプシドタンパク質。
- 配列番号2のアミノ酸配列、または2つのN末端アミノ酸のうちの少なくとも1つの修飾によって配列番号2のアミノ酸配列と異なる、配列番号2のアミノ酸配列の変異形を有する、請求項1に記載の前記カプシドタンパク質。
- アデノ随伴ウイルス(AAV)のカプシドタンパク質である、請求項1又は2に記載の前記カプシドタンパク質。
- 血清型2、4、6、8、及び9からなる群から選択される血清型のAAVのカプシドタンパク質である、請求項3に記載の前記カプシドタンパク質。
- 血清型2のAAVのカプシドタンパク質である、請求項4に記載の前記カプシドタンパク質。
- 血清型2のAAVのVP1タンパク質である、請求項5に記載の前記カプシドタンパク質。
- 前記ペプチドが、前記カプシドのアミノ酸550〜600の領域内に存在する、請求項1〜6のいずれか一項に記載の前記カプシドタンパク質。
- 配列番号9のアミノ酸配列を含む、請求項1〜7のいずれか一項に記載の前記カプシドタンパク質。
- 請求項1〜8のいずれか一項に記載のカプシドタンパク質を含む、ウイルスカプシド。
- 請求項1〜8のいずれか一項に記載のカプシドタンパク質をコードする、核酸。
- 請求項10に記載の核酸を含む、プラスミド。
- カプシド及びその中にパッケージングされた導入遺伝子を含む組み換えウイルスベクターであって、前記カプシドが、配列番号1もしくは配列番号2のアミノ酸配列を有するか、または2つのN末端アミノ酸のうちの少なくとも1つの修飾によって配列番号2のアミノ酸配列と異なる、配列番号2の変異形を有する、少なくとも1つのカプシドタンパク質を含む、前記組み換えウイルスベクター。
- 組み換えAAVベクターである、請求項12に記載の前記組み換えウイルスベクター。
- 血清型2、4、6、8、及び9からなる群から選択される血清型のAAVベクターである、請求項13に記載の前記組み換えウイルスベクター。
- 血清型2のAAVベクターである、請求項14に記載の前記組み換えウイルスベクター。
- 前記導入遺伝子が、一酸化窒素合成酵素または骨形成タンパク質受容体2(BMPR2)をコードする、請求項12〜15のいずれか一項に記載の前記組み換えウイルスベクター。
- 前記導入遺伝子が、内皮一酸化窒素合成酵素(eNOS)または誘導型一酸化窒素合成酵素(iNOS)をコードする、請求項16に記載の前記組み換えウイルスベクター。
- 前記導入遺伝子が、ssDNAまたはdsDNAの形態である、請求項12〜17のいずれか一項に記載の前記組み換えウイルスベクター。
- 対象における肺障害または肺疾患の治療のための方法における使用のための、請求項12〜18のいずれか一項に記載の前記組み換えウイルスベクター。
- 前記肺疾患が、肺高血圧症または肺動脈性肺高血圧症である、請求項19に記載の前記組み換えウイルスベクター。
- 前記対象が哺乳動物、好ましくはヒトである、請求項19または20に記載の前記組み換えウイルスベクター。
- 前記ベクターが、静脈内投与のために製剤化される、請求項19〜21のいずれか一項に記載の前記組み換えウイルスベクター。
- 請求項1〜8のいずれか一項に記載のカプシドタンパク質、請求項9に記載のウイルスカプシド、請求項10に記載の核酸、請求項11に記載のプラスミド、または請求項12〜18のいずれか一項に記載の組み換えウイルスベクターを含む、細胞。
- 請求項1〜8のいずれか一項に記載のカプシドタンパク質、請求項9に記載のウイルスカプシド、請求項10に記載の核酸、請求項11に記載のプラスミド、または請求項12〜18のいずれか一項に記載の組み換えウイルスベクターを含む、薬学的組成物。
- 対象(但し、ヒトを除く。)における肺障害または肺疾患の治療のための、請求項1〜8のいずれか一項に記載のカプシドタンパク質、請求項9に記載のウイルスカプシド、請求項10に記載の核酸、請求項11に記載のプラスミド、または請求項12〜18のいずれか一項に記載の組み換えウイルスベクターの使用。
- 前記肺疾患が、肺高血圧症または肺動脈性肺高血圧症である、請求項25に記載の前記使用。
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DE102013215817.3A DE102013215817A1 (de) | 2013-08-09 | 2013-08-09 | Neue peptide mit spezifität für die lunge |
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PCT/EP2014/066892 WO2015018860A1 (de) | 2013-08-09 | 2014-08-06 | Neue peptide mit spezifität für die lunge |
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WO2018106956A2 (en) | 2016-12-07 | 2018-06-14 | University Of Florida Research Foundation, Incorporated | IL-1RA CDNAs |
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WO2020221911A1 (en) | 2019-05-02 | 2020-11-05 | Boehringer Ingelheim International Gmbh | Viral vectors and nucleic acids for use in the treatment of pf-ild and ipf |
EP4153745A1 (en) | 2020-05-17 | 2023-03-29 | Boehringer Ingelheim International GmbH | Viral vectors and nucleic acids for regulated gene therapy |
EP4240850A1 (en) | 2020-11-04 | 2023-09-13 | Boehringer Ingelheim International GmbH | Viral vectors and nucleic acids for use in the treatment of ild, pf-ild and ipf |
WO2022096563A1 (en) | 2020-11-04 | 2022-05-12 | Boehringer Ingelheim International Gmbh | Viral vectors and nucleic acids for use in the treatment of ild, pf-ild and ipf |
JP2024501821A (ja) | 2020-12-23 | 2024-01-16 | ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング | 心臓組織細胞に対する特異性を有するウイルスカプシドタンパク質 |
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US7427396B2 (en) * | 2004-06-03 | 2008-09-23 | Genzyme Corporation | AAV vectors for gene delivery to the lung |
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DE102013215817A1 (de) | 2015-02-12 |
JP2016527298A (ja) | 2016-09-08 |
US20210187062A1 (en) | 2021-06-24 |
EP3536794A2 (de) | 2019-09-11 |
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